CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > CFX

Efficiency prediction of centrifugal pumps in CFX

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   August 1, 2014, 08:18
Question Efficiency prediction of centrifugal pumps in CFX
  #1
New Member
 
Ji Pei
Join Date: Nov 2010
Posts: 8
Rep Power: 15
peiji1984 is on a distinguished road
Dear all,
I have done a lot of simulations for centrifugal pumps in CFX, and I found that the efficiency prediction (ρgQH/Mω) is not accurate, especially for a centrifugal pump with very large flow rate as design point, for example, 10000 cubic meter per hour. At design point, the head result is acceptable, but the efficiency result is obviously lower than the test data. Does anybody have the experience about this? I will be very appreciated if you can explain to me.
Thanks a lot!
Ji
peiji1984 is offline   Reply With Quote

Old   November 19, 2022, 03:23
Default
  #2
New Member
 
Ahmed mohamed
Join Date: Oct 2022
Posts: 1
Rep Power: 0
Ahmedelshetiry is on a distinguished road
I have the same problem. Did you get any solution?
Ahmedelshetiry is offline   Reply With Quote

Old   November 19, 2022, 09:24
Default
  #3
Senior Member
 
Daniel
Join Date: Feb 2017
Location: Germany
Posts: 147
Rep Power: 9
zacko is on a distinguished road
How are you computing the Moment ? I assume you use the torque variable in Post of blade, hub and shroud ? Are you modeling the side chambers ? This is obviously a simplification which will result in a difference in test data and simulation data. But, in my experience, the Efficiency would be higher then (without side chambers).
By which magnitude do the test data and CFD result differ ?
Convergence was reached, correct ? Is the mesh accurate enough ?
Are you evaluating your hydraulic data at a similar position like the test data, e.g. suction and discharge pipe position ?

Last edited by zacko; November 19, 2022 at 20:06.
zacko is offline   Reply With Quote

Reply

Tags
centrifugal pump, efficiency

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Cyclone separation efficiency using CFX Benfa CFX 20 April 9, 2019 13:10
Particle Interaction is CFX; Adding Interparticle Attraction such as Van Der Waals FrankS CFX 11 November 12, 2013 19:53
Pros and Cons for CFX, CFdesign, COMSOL Val Main CFD Forum 3 June 10, 2011 02:20
CFX or STAR-CD for Gerotor pumps? learningCFD Main CFD Forum 1 September 22, 2007 05:14
CFX 4.4 installation problem Pandu Sattvika CFX 1 December 1, 2001 04:07


All times are GMT -4. The time now is 17:37.